マグネシウム単結晶の曲げ変形挙動に対するイットリウム添加の影響

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  • Oka Kenta
    Graduate School of Science and Technology, Kumamoto University
  • Fukumori Ryota
    Graduate School of Science and Technology, Kumamoto University
  • Tsushida Masayuki
    Technical Division, Kumamoto University
  • Kitahara Hiromoto
    Institute of Industrial Nanomaterials, Kumamoto University Magnesium Research Center, Kumamoto University
  • Ando Shinji
    Magnesium Research Center, Kumamoto University

書誌事項

タイトル別名
  • Effects of Yttrium Addition on Bending Deformation Behavior of Magnesium Single Crystals
  • マグネシウムタンケッショウ ノ マゲ ヘンケイ キョドウ ニ タイスル イットリウム テンカ ノ エイキョウ

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説明

<p>Pure magnesium and Mg–Y alloy single crystals were subjected to three-point bending tests to investigate the effect of crystal orientation and yttrium on bending deformation behavior. Specimens whose neutral planes are parallel to (0001) and neutral axes are [1120] deformed due to basal slips, displaying a gull-shape. Their bending yield stresses increased by addition of yttrium and were controlled by the shear stress on the basal plane. Conversely, neutral planes parallel to (1100) and neutral axes are [1120] resulting in specimens deformed due to {1012} twins occurred at the compression side, basal slips within the twins and finally showed a V-shape. In Mg–Y alloys, first order pyramidal ⟨c + a⟩ slips (FPCS) and {1011}-{1012} double twins were also activated in the tension area. Their bending yield stresses and bending ductility increased by yttrium addition. Strain induced by {1011}-{1012} double twins at the tension side was very low. FPCS was found to be activated by addition of yttrium and to increase bending ductility.</p> <p> </p> <p>This Paper was Originally Published in Japanese in J. Japan Inst. Met. Mater. 84 (2020) 344–351.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 62 (4), 484-491, 2021-04-01

    公益社団法人 日本金属学会

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